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|
<!DOCTYPE html>
<html>
<!--
Copyright 2008 The Closure Library Authors. All Rights Reserved.
Use of this source code is governed by the Apache License, Version 2.0.
See the COPYING file for details.
-->
<head>
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>Closure Unit Tests - goog.testing.PropertyReplacer</title>
<script src="../base.js"></script>
<script>
goog.require('goog.testing.PropertyReplacer');
goog.require('goog.testing.asserts');
goog.require('goog.testing.jsunit');
</script>
</head>
<body>
<script>
// Test PropertyReplacer with JavaScript objects.
function testSetJsProperties() {
var stubs = new goog.testing.PropertyReplacer();
var x = {a: 1, b: undefined};
// Setting simple values.
stubs.set(x, 'num', 1);
assertEquals('x.num = 1', 1, x.num);
stubs.set(x, 'undef', undefined);
assertTrue('x.undef = undefined', 'undef' in x && x.undef === undefined);
stubs.set(x, 'null', null);
assertTrue('x["null"] = null', x['null'] === null);
// Setting a simple value that existed originally.
stubs.set(x, 'b', null);
assertTrue('x.b = null', x.b === null);
// Setting a complex value.
stubs.set(x, 'obj', {});
assertEquals('x.obj = {}', 'object', typeof x.obj);
stubs.set(x.obj, 'num', 2);
assertEquals('x.obj.num = 2', 2, x.obj.num);
// Overwriting a leaf.
stubs.set(x.obj, 'num', 3);
assertEquals('x.obj.num = 3', 3, x.obj.num);
// Overwriting a non-leaf.
stubs.set(x, 'obj', {});
assertFalse('x.obj = {} again', 'num' in x.obj);
// Setting a function.
stubs.set(x, 'func', function(n) { return n + 1; });
assertEquals('x.func = lambda n: n+1', 11, x.func(10));
// Setting a constructor and a prototype method.
stubs.set(x, 'Class', function(num) { this.num = num; });
stubs.set(x.Class.prototype, 'triple', function() { return this.num * 3; });
assertEquals('prototype method', 12, (new x.Class(4)).triple());
// Cleaning up with UnsetAll() twice. The second run should have no effect.
for (var i = 0; i < 2; i++) {
stubs.reset();
assertEquals('x.a preserved', 1, x.a);
assertTrue('x.b reset', 'b' in x && x.b === undefined);
assertFalse('x.num removed', 'num' in x);
assertFalse('x.undef removed', 'undef' in x);
assertFalse('x["null"] removed', 'null' in x);
assertFalse('x.obj removed', 'obj' in x);
assertFalse('x.func removed', 'func' in x);
assertFalse('x.Class removed', 'Class' in x);
}
}
// Test removing JavaScript object properties.
function testRemoveJsProperties() {
var stubs = new goog.testing.PropertyReplacer();
var orig = {'a': 1, 'b': undefined};
var x = {'a': 1, 'b': undefined};
stubs.remove(x, 'a');
assertFalse('x.a removed', 'a' in x);
assertTrue('x.b not removed', 'b' in x);
stubs.reset();
assertObjectEquals('x.a reset', x, orig);
stubs.remove(x, 'b');
assertFalse('x.b removed', 'b' in x);
stubs.reset();
assertObjectEquals('x.b reset', x, orig);
stubs.set(x, 'c', 2);
stubs.remove(x, 'c');
assertObjectEquals('x.c added then removed', x, orig);
stubs.reset();
assertObjectEquals('x.c reset', x, orig);
stubs.remove(x, 'b');
stubs.set(x, 'b', undefined);
assertObjectEquals('x.b removed then added', x, orig);
stubs.reset();
assertObjectEquals('x.b reset', x, orig);
stubs.remove(x, 'd');
assertObjectEquals('removing non-existing key', x, orig);
stubs.reset();
assertObjectEquals('reset removing non-existing key', x, orig);
}
// Test PropertyReplacer with prototype chain.
function testPrototype() {
var stubs = new goog.testing.PropertyReplacer();
// Simple inheritance.
var a = {a: 0};
function B() {};
B.prototype = a;
var b = new B();
stubs.set(a, 0, 1);
stubs.set(b, 0, 2);
stubs.reset();
assertEquals('a.a == 0', 0, a['a']);
assertEquals('b.a == 0', 0, b['a']);
// Inheritance with goog.inherits.
var c = {a: 0};
function C() {};
C.prototype = c;
function D() {};
goog.inherits(D, C);
var d = new D();
var stubs = new goog.testing.PropertyReplacer();
stubs.set(c, 'a', 1);
stubs.set(d, 'a', 2);
stubs.reset();
assertEquals('c.a == 0', 0, c['a']);
assertEquals('d.a == 0', 0, d['a']);
// Setting prototype fields.
stubs.set(B.prototype, 'c', 'z');
assertEquals('b.c=="z"', 'z', b.c);
stubs.reset();
assertFalse('b.c deleted', 'c' in b);
// Setting Object.prototype's fields.
stubs.set(Object.prototype, 'one', 1);
assertEquals('b.one==1', 1, b.one);
stubs.reset();
assertFalse('b.one deleted', 'one' in b);
stubs.set(Object.prototype, 'two', 2);
stubs.remove(b, 'two');
assertEquals('b.two==2', 2, b.two);
stubs.remove(Object.prototype, 'two');
assertFalse('b.two deleted', 'two' in b);
stubs.reset();
assertFalse('Object prototype reset', 'two' in b);
}
// Test replacing function properties.
function testFunctionProperties() {
var stubs = new goog.testing.PropertyReplacer();
stubs.set(Array, 'x', 1);
assertEquals('Array.x==1', 1, Array.x);
stubs.reset();
assertFalse('Array.x deleted', 'x' in Array);
stubs.set(Math.random, 'x', 1);
assertEquals('Math.random.x==1', 1, Math.random.x);
stubs.reset();
assertFalse('Math.random.x deleted', 'x' in Math.random);
}
// Test the hasKey_ private method.
function testHasKey() {
f = goog.testing.PropertyReplacer.hasKey_;
assertFalse('{}.a', f({}, 'a'));
assertTrue('{a:0}.a', f({a: 0}, 'a'));
function C() {};
C.prototype.a = 0;
assertFalse('C.prototype.a set, is C.a own?', f(C, 'a'));
assertTrue('C.prototype.a', f(C.prototype, 'a'));
assertFalse('C.a not set', f(C, 'a'));
C.a = 0;
assertTrue('C.a set', f(C, 'a'));
var c = new C();
assertFalse('C().a, inherited', f(c, 'a'));
c.a = 0;
assertTrue('C().a, own', f(c, 'a'));
assertFalse('window, invalid key', f(window, 'no such key'));
assertTrue('window, global variable', f(window, 'goog'));
assertTrue('window, build-in key', f(window, 'location'))
assertFalse('document, invalid key', f(document, 'no such key'));
assertTrue('document.body', f(document, 'body'));
var div = document.createElement('div');
assertFalse('div, invalid key', f(div, 'no such key'));
assertTrue('div.className', f(div, 'className'));
div['a'] = 0;
assertTrue('div, key added by JS', f(div, 'a'));
assertFalse('Date().getTime', f(new Date(), 'getTime'));
assertTrue('Date.prototype.getTime', f(Date.prototype, 'getTime'));
assertFalse('Math, invalid key', f(Math, 'no such key'));
assertTrue('Math.random', f(Math, 'random'));
function Parent() {};
Parent.prototype.a = 0;
function Child() {};
goog.inherits(Child, Parent);
assertFalse('goog.inherits, parent prototype', f(new Child, 'a'));
Child.prototype.a = 1;
assertFalse('goog.inherits, child prototype', f(new Child, 'a'));
function OverwrittenProto() {};
OverwrittenProto.prototype = {a: 0};
assertFalse(f(new OverwrittenProto, 'a'));
}
// Test PropertyReplacer with DOM objects' built in attributes.
function testDomBuiltInAttributes() {
var div = document.createElement('div');
div.id = 'old-id';
var stubs = new goog.testing.PropertyReplacer();
stubs.set(div, 'id', 'new-id');
stubs.set(div, 'className', 'test-class');
assertEquals('div.id == "new-id"', 'new-id', div.id);
assertEquals('div.className == "test-class"', 'test-class', div.className);
stubs.remove(div, 'className');
// '' in Firefox, undefined in Chrome.
assertEvaluatesToFalse('div.className is empty', div.className);
stubs.reset();
assertEquals('div.id == "old-id"', 'old-id', div.id);
assertEquals('div.name == ""', '', div.className);
}
// Test PropertyReplacer with DOM objects' custom attributes.
function testDomCustomAttributes() {
var div = document.createElement('div');
div.attr1 = 'old';
var stubs = new goog.testing.PropertyReplacer();
stubs.set(div, 'attr1', 'new');
stubs.set(div, 'attr2', 'new');
assertEquals('div.attr1 == "new"', 'new', div.attr1);
assertEquals('div.attr2 == "new"', 'new', div.attr2);
stubs.set(div, 'attr3', 'new');
stubs.remove(div, 'attr3');
assertEquals('div.attr3 == undefined', undefined, div.attr3);
stubs.reset();
assertEquals('div.attr1 == "old"', 'old', div.attr1);
assertEquals('div.attr2 == undefined', undefined, div.attr2);
}
// Test PropertyReplacer overriding Math.random.
function testMathRandom() {
var stubs = new goog.testing.PropertyReplacer();
stubs.set(Math, 'random', function() { return -1; });
assertEquals('mocked Math.random', -1, Math.random());
stubs.reset();
assertNotEquals('original Math.random', -1, Math.random());
}
// Tests the replace method of PropertyReplacer.
function testReplace() {
var stubs = new goog.testing.PropertyReplacer();
function C() {
this.a = 1;
};
C.prototype.b = 1;
C.prototype.toString = function() {
return 'obj';
};
var obj = new C();
stubs.replace(obj, 'a', 2);
assertEquals('successfully replaced the own property of an object', 2, obj.a);
stubs.replace(obj, 'b', 2);
assertEquals('successfully replaced the property in the prototype', 2, obj.b);
var error = assertThrows('cannot replace missing key',
goog.bind(stubs.replace, stubs, obj, 'unknown', 1));
// Using assertContains instead of assertEquals because Opera 10.0 adds
// the stack trace to the error message.
assertEquals('error message for missing key',
'Cannot replace missing property "unknown" in obj', error.message);
assertFalse('object not touched', 'unknown' in obj);
var error = assertThrows('cannot change value type',
goog.bind(stubs.replace, stubs, obj, 'a', '3'));
assertContains('error message for type mismatch',
'Cannot replace property "a" in obj with a value of different type',
error.message);
}
// Tests altering complete namespace paths.
function testSetPath() {
goog.global.a = {b: {}};
var stubs = new goog.testing.PropertyReplacer();
stubs.setPath('a.b.c.d', 1);
assertObjectEquals('a.b.c.d=1', {b: {c: {d: 1}}}, goog.global.a);
stubs.setPath('a.b.e', 2);
assertObjectEquals('a.b.e=2', {b: {c: {d: 1}, e: 2}}, goog.global.a);
stubs.setPath('a.f', 3);
assertObjectEquals('a.f=3', {b: {c: {d: 1}, e: 2}, f: 3}, goog.global.a);
stubs.setPath('a.f.g', 4);
assertObjectEquals('a.f.g=4', {b: {c: {d: 1}, e: 2}, f: {g: 4}},
goog.global.a);
stubs.setPath('a', 5);
assertEquals('a=5', 5, goog.global.a);
stubs.setPath('x.y.z', 5);
assertObjectEquals('x.y.z=5', {y: {z: 5}}, goog.global.x);
stubs.reset();
assertObjectEquals('a.* reset', {b: {}}, goog.global.a);
// NOTE: it's impossible to delete global variables in Internet Explorer,
// so ('x' in goog.global) would be true.
assertUndefined('x.* reset', goog.global.x);
}
// Tests altering paths with functions in them.
function testSetPathWithFunction() {
var f = function() {};
goog.global.a = {b: f};
var stubs = new goog.testing.PropertyReplacer();
stubs.setPath('a.b.c', 1);
assertEquals('a.b.c=1, f kept', f, goog.global.a.b);
assertEquals('a.b.c=1, c set', 1, goog.global.a.b.c);
stubs.setPath('a.b.prototype.d', 2);
assertEquals('a.b.prototype.d=2, b kept', f, goog.global.a.b);
assertEquals('a.b.prototype.d=2, c kept', 1, goog.global.a.b.c);
assertFalse('a.b.prototype.d=2, a.b.d not set', 'd' in goog.global.a.b);
assertTrue('a.b.prototype.d=2, proto set', 'd' in goog.global.a.b.prototype);
assertEquals('a.b.prototype.d=2, d set', 2, new goog.global.a.b().d);
var invalidSetPath = function() {
stubs.setPath('a.prototype.e', 3);
};
assertThrows('setting the prototype of a non-function', invalidSetPath);
stubs.reset();
assertObjectEquals('a.b.c reset', {b: f}, goog.global.a);
assertObjectEquals('a.b.prototype reset', {}, goog.global.a.b.prototype);
}
</script>
</body>
</html>
|
